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Titolo:
RELATIVISTIC AND GAUGE-INDEPENDENT OFF-SHELL CORRECTIONS TO THE TOPONIUM DECAY WIDTH
Autore:
MODRITSCH W; KUMMER W;
Indirizzi:
VIENNA TECH UNIV,INST THEORET PHYS,WIEDNER HAUPTSTR 8-10-136 A-1040 VIENNA AUSTRIA
Titolo Testata:
Nuclear physics. B
fascicolo: 1, volume: 430, anno: 1994,
pagine: 3 - 12
SICI:
0550-3213(1994)430:1<3:RAGOCT>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY QUARKS; T(T)OVER-BAR PRODUCTION; MOMENTUM DISTRIBUTIONS; RADIATIVE-CORRECTIONS; THRESHOLD; POSITRONIUM; PAIR; QCD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
W. Modritsch e W. Kummer, "RELATIVISTIC AND GAUGE-INDEPENDENT OFF-SHELL CORRECTIONS TO THE TOPONIUM DECAY WIDTH", Nuclear physics. B, 430(1), 1994, pp. 3-12

Abstract

Off-shell and relativistic bound-state corrections for the decay t-->, b+W are calculated to O(alpha(s)(2)) making full use of the Bethe-Salpeter formalism for weakly bound systems. Thus we are able to take into account all terms to that order in a systematic and straightforwardmanner. One of the previously not considered contributions cancels precisely gauge dependent terms which appeared in an earlier off-shell calculation. Important cancellations also determine the gauge-independent part.

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Documento generato il 29/11/20 alle ore 00:35:26